New Donor-Acceptor Stenhouse Adducts as Visible and Near Infrared Light Polymerization Photoinitiators
نویسندگان
چکیده
منابع مشابه
Design and synthesis of donor-acceptor Stenhouse adducts: a visible light photoswitch derived from furfural.
The development of an easily synthesized, modular, and tunable organic photoswitch that responds to visible light has been a long-standing pursuit. Herein we provide a detailed account of the design and synthesis of a new class of photochromes based on furfural, termed donor-acceptor Stenhouse adducts (DASAs). A wide variety of these derivatives are easily prepared from commercially available s...
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Donor-acceptor Stenhouse adducts (DASAs) are negative photochromes that hold great promise for a variety of applications. Key to optimizing their switching properties is a detailed understanding of the photoswitching mechanism, which, as yet, is absent. Here we characterize the actinic step of DASA-photoswitching and its key intermediate, which was studied using a combination of ultrafast visib...
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We report photochromic donor-acceptor Stenhouse adducts (DASAs) capable of fully reversible photoisomerization with visible light in organic solvents including chloroform, acetonitrile and benzene. The rates of photoisomerization and thermal reversion can be tuned by altering the electronics of the donor adduct. X-Ray crystallography and photo-NMR experiments unambiguously establish molecular s...
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Donor–acceptor Stenhouse adducts (DASAs) have recently emerged as a new class of photoswitchable molecules. 2] These compounds feature a system of three conjugated C=C double bonds connecting an aliphatic amine “donor” and a 1,3-dicarbonyl “acceptor”, giving rise to an intense absorption in the visible (green) region. DASAs serve as an example of negative photochromic materials : exposing the t...
متن کاملFace Matching Between Near Infrared and Visible Light Images
In many applications, such as E-Passport and driver’s license, the enrollment of face templates is done using visible light (VIS) face images. Such images are normally acquired in controlled environment where the lighting is approximately frontal. However, Authentication is done in variable lighting conditions. Matching of faces in VIS images taken in different lighting conditions is still a bi...
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ژورنال
عنوان ژورنال: Molecules
سال: 2020
ISSN: 1420-3049
DOI: 10.3390/molecules25102317